Details

Autor(en) / Beteiligte

• Aversa, Pierfrancesco
• Ӧz, Senol
• Jung, Eunhwan
• Plantevin, Olivier
• Cavani, Olivier
• Ollier, Nadège
• Bourée, Jean-Eric
• Geffroy, Bernard
• Miyasaka, Tsutomu
• Mathur, Sanjay
• Corbel, Catherine

Titel

Electron irradiation induced aging effects on radiative recombination properties of quadruple cation organic-inorganic perovskite layers

Ist Teil von

• Emergent materials (Online), 2020-04, Vol.3 (2), p.133-160

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Understanding the role of defects in hybrid organic inorganic perovskites (HOIPs) is critically important to engineer the stability and performance of photovoltaic devices based on HOIPs. Recent reports on multi-cation compositions of general formula (A 1 ,A 2 ,A 3 ,A 4 )Pb(X 1 ,X 2 ,X 3 ) 3 , where the A sites can be occupied by a distribution of 2–4 metallic/organic cations and X sites with halide anions have shown stabilization effects against the well-known methyl ammonium lead triiodide (CH 3 NH 3 PbI 3 ), although the underlying mechanism is not fully elucidated. Herein, polycrystalline layers of 4APb(IBr) 3 perovskite, where A is occupied by a combination of Cs + (cesium ion), GA + (guanidinium), MA + (methylammonium), and FA + (formamidinium) ions were synthesized. To gain insight on the role of intrinsic defects, electron irradiation was used for introducing point defects in a controlled way in the quadruple-cation HOIPs. Our results show that the engineered defects in perovskites strongly influenced the absorption, photoluminescence, and time-resolved photoluminescence of these materials, probably due to introduction of additional energy levels that modify electronic and light emitting properties of the material. Furthermore, the irradiation-induced defects were found to strongly affect the aging behavior of HOIPs and modify their radiative recombination properties.